Why not just put in a machine next to the gun smith that allows you to fully customize your guns colors? Like if I wanted to add a skull on the side or change the radicle in the center? Have it cost like 500glimmer per change. So a skull, change it's color designs to black and white (500 each), and a radicle for a total of 2k? Fair price I think? And not a hard thing to implement.